Most Helpful Girl
I would say to be very careful with it. My salon stopped doing Keratin treatments a while ago. It was found that it had too much formaldehyde in it and it was causing liver damage /:
I heard they now have formaldehyde-free treatments and I would definitely ask your salon about how much formaldehyde is in the products. As long as its safe I think its a wonderful thing, and a great alternative to japanese hair straightening or a relaxer.